RTEMS | build: add tool build key validation (!1125)

Wed Mar 18 00:30:34 UTC 2026

Sebastian Huber commented on a discussion on wscript: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1125#note_145904

 >      return top_group
 >  
 >  
 > +import subprocess
 > +import re
 > +
 > +
 > +def get_gcc_build_key(compiler):

I updated the MR with a proposal for the `GCC_BUILD_KEY_POLICY` option. In the overall commits, there are no changes in the `wscript`.

I changed the regular expression to `r"Build (\d{4}\.\d{2}.\d{2})"` since my tools report something like this:
```
/opt/rtems/7/bin/powerpc-rtems7-gcc --version
powerpc-rtems7-gcc (GCC) 15.2.0 20250808 (RTEMS 7, Build 2026.03.04, RSB 751299446e8f7d41023ef7b5236cc378a52291c6, Newlib a7c61498)
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
```
I guess we need the `Build` key reported by RSB and not the date of the compiler?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1125#note_145904
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